I've got a particular network setup that is beyond the traditionnal leased-lines scenario to which I have 3 Cisco 1711 routers serving my 3 sites, and I want to implement QOS for Voice and Video apps that ocasionally transit between sites.
The WAN is a dedicated bandwidth cloud, to whch the head-office has 3 mbits, and the remote offices are provided with 1.5mbit, all of this is served over 100base-T ethernet.
192.168.0.0/19 -- Head-Office
+192.168.0.0/24 -- WAN (192.168.0.1 on FastEthernet0)
+192.168.1.0/24 -- LAN (192.168.1.1 on FastEthernet1)
192.168.16.0/19 -- Remote Office 1
+192.168.16.0/24 -- WAN (192.168.16.1 on FastEthernet0)
+192.168.17.0/24 -- LAN (192.168.17.1 on FastEthernet1)
192.168.32.0/19 -- Remote Office 2
+192.168.32.0/24 -- WAN (192.168.32.1 on FastEthernet0)
+192.168.33.0/24 -- LAN (192.168.33.1 on FastEthernet1)
With regards to the packet priorisation and packet matching:
1st Priority - Voice: Non-Cisco VOIP/RTP (udp 20000:25000)
2nd Priority - Video: VideoConferencing (udp 12000:15000)
3rd Priority - Desktop: RemoteDesktop (tcp 3389)
4th Priority - Other: Other (unmatched traffic)
I want to avoid at most possible to do bandwidth reservation, however, I believe that in a scenario like this, its necessary.